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Size of the Rabbit Mammary Gland with Successive Lactations^*,

Department of Dairy Husbandry, University of Missouri

ABSTRACT

It was thought that the rabbit might illustrate the influence of mammary gland development in dairy cows as a cause of the increase in milk production with succeeding pregnancies. This increased production is greater than can be accounted for by the increase in body weight. The lateral extension of the mammary glands in succeeding lactations was compared in rabbits with lines tattooed in the skin at the lateral extent of the mammary glands early in the first lactation. In eleven succeeding lactations only one case was found in which the mammary glands on one side extended past the tattoo line. The lateral extent of the glands did not increase in the other cases.

^* Contribution from the Department of Dairy Husbandry, Missouri Agricultural Experiment Station, Journal Series No. 773.

Aided in part by a grant from the International Cancer Research Foundation.